Racking structure



FIG. 1 is a front perspective view of the racking structure showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a front right side perspective view thereof;

FIG. 4 is a front left side perspective view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a rear perspective view thereof;

FIG. 8 is a rear elevation view thereof;

FIG. 9 is a rear right side perspective view thereof;

FIG. 10 is a rear left side perspective view thereof;

FIG. 11 is a bottom perspective view thereof;

FIG. 12 is a bottom plan view thereof; and,

FIG. 13 is a top plan view thereof.

Throughout the Figures, aspects shown in broken lines are included for the purpose of illustrating environmental structure and are not a part of claimed design. 

CLAIM The ornamental design for a racking structure, as shown and described. 